Ubuntu Security Notice USN-1521-1

Ubuntu Security Notice 1521-1 - Chamal De Silva discovered that the IcedTea-Web Java web browser plugin could dereference an uninitialized pointer. A remote attacker could use this to craft a malicious web page that could cause a denial of service by crashing the web browser or possibly execute arbitrary code. Steven Bergom and others discovered that the IcedTea-Web Java web browser plugin assumed that all strings provided by browsers are NULL terminated, which is not guaranteed by the NPAPI (Netscape Plugin Application Programming Interface). A remote attacker could use this to craft a malicious Java applet that could cause a denial of service by crashing the web browser, expose sensitive information or possibly execute arbitrary code. Various other issues were also addressed.

Chamal De Silva discovered that the IcedTea-Web Java web browserplugin could dereference an uninitialized pointer. A remote attackercould use this to craft a malicious web page that could cause adenial of service by crashing the web browser or possibly executearbitrary code. (CVE-2012-3422)

Steven Bergom and others discovered that the IcedTea-Web Java webbrowser plugin assumed that all strings provided by browsers are NULLterminated, which is not guaranteed by the NPAPI (Netscape PluginApplication Programming Interface). A remote attacker could use thisto craft a malicious Java applet that could cause a denial of serviceby crashing the web browser, expose sensitive information or possiblyexecute arbitrary code. (CVE-2012-3423)

Update instructions:

The problem can be corrected by updating your system to the followingpackage versions: